Results 71 to 80 of about 27,431 (169)

Critical comments on the paper "Crossing $\omega=-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)]

open access: yes, 2008
It is demonstrated that the claim in the paper "Crossing $\omega=-1$ by a single scalar field on a Dvali-Gabadadze-Porrati brane" by H Zhang and Z-H Zhu [Phys.Rev.D75,023510(2007)], about a prove that there do not exist scaling solutions in a universe ...
D. M. Capper   +5 more
core   +1 more source

Creant universos virtuals. Supercomputació en astrofísica [PDF]

open access: yes, 2012
Creating Virtual Worlds. Supercomputing in Astrophysics.Astrophysics and Cosmology are disciplines in which we cannot reproduce the phenomena studied in the laboratory.
José Maria Ibáñez   +2 more
core   +1 more source

A new symmetry of the relativistic wave equation

open access: yes, 2011
In this paper we show that there exists a new symmetry in the relativistic wave equation for a scalar field in arbitrary dimensions. This symmetry is related to redefinitions of the metric tensor which implement a map between non-equivalent manifolds. It
Falciano, F. T., Goulart, E.
core   +1 more source

Consideration on the concept of “nature” in Comenius
Considerações sobre o conceito de “natureza” em Comenius

open access: yesSemina: Ciências Sociais e Humanas, 2003
The present article aims to recover the concept of ‘nature” elaborated by Comenius, based on two of his most important books, Didatica Magna (1638) and Orbis Sensualium Pictus (1658).
Marcos Alexandre Gomes Nalli
doaj  

X-ray pulsed light curves of highly compact neutron stars as probes of scalar–tensor theories of gravity

open access: yesEuropean Physical Journal C: Particles and Fields
The strong gravitational potential of neutron stars (NSs) makes them ideal astrophysical objects for testing extreme gravity phenomena. We explore the potential of NS X-ray pulsed light curve observations to probe deviations from general relativity (GR ...
Tulio Ottoni   +4 more
doaj   +1 more source

Cosmologia desâna

open access: yesAnuário Antropológico, 2018
El conjunto de relatos míticos Desâna, editado con el título de “Antes o mundo não existia” (Kumu & Kenhiri 1980), tiene la virtud de ampliar la cantidad de publicaciones sobre ese grupo con un material extremadamente valioso, por cuanto se trata de ...
Ana Maria Gorosito Kramer
doaj  

Matéria e espírito na cosmologia jonasiana

open access: yesCadernos Cajuína, 2017
A abrangência temática dos escritos jonasianos é tão surpreendente quanto a profundidade com que os temas são neles abordados. Um bom exemplo dessa afirmação pode ser encontrado num opúsculo intitulado Materie, Geist und Shöpfung, brilhantemente ...
Lilian Godoy
doaj  

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